docs: def get_keys(self, alias_name, key_format):
          """
          Retrieves the contents of PKCS12 file in the format specified.
          This PKCS12 formatted file contains both the certificate as well as the key file data.
          Valid key formats are Base64 and PKCS12.
  
          Args:
              alias_name: Key pair associated with the RabbitMQ
              key_format: Valid key formats are Base64 and PKCS12.
          Returns:
              dict: RabbitMQ certificate
          """
          uri = self.URI + "/keys/" + alias_name + "?format=" + key_format
          return self._client.get(uri)